How to export fluid animation 100% prebaked and import to UE4
Some time ago I actually found a way to achieve this.

In this video you will learn how to export .abc file from Blender properly, and then you can use this add-on to simply import an .abc file into Unity.



Though the document is in Japanese, I think it's easy to follow.

By following these steps, you can get a nice animation outcome, just as in Blender.